英语听力精选进阶版 14074（在线收听）

Tick numbers increase

Vocabulary

fatigue

extreme physical or mental tiredness; weariness

fatal

capable of causing death

ticks

tiny insects which feed on blood

extinct

(a species that has) died out

life cycle

stages of development during life

reproduce

generate offspring

reforestation

planting new trees

conservation

preserving animals or the environment for the future

a nuisance

something which is annoying

drops dramatically

falls greatly